currently does.  This is now the default Win32 wal sync method because
we perfer o_datasync to fsync.

Also, change Win32 fsync to a new wal sync method called
fsync_writethrough because that is the behavior of _commit, which is
what is used for fsync on Win32.

Backpatch to 8.0.X.

< * Add ANSI INTERVAL handling
> * Add ISo INTERVAL handling
< 	o Interpret syntax that isn't uniquely ANSI or PG, like '1:30' or
< 	  '1' as ANSI syntax, e.g. interpret '1:30' MINUTE TO SECOND as
> 	o Interpret syntax that isn't uniquely ISO or PG, like '1:30' or
> 	  '1' as ISO syntax, e.g. interpret '1:30' MINUTE TO SECOND as
649c649
< * Add pre-parsing phase that converts non-ANSI syntax to supported
> * Add pre-parsing phase that converts non-ISO syntax to supported

per request from Tom.

< 	o Process mixed ANSI/PG syntax, and round value to requested
< 	  precision or generate an error
< 	o Interpret INTERVAL '1 year' MONTH as CAST (INTERVAL '1 year' AS
< 	  INTERVAL MONTH), and this should return '12 months'
194a191,194
> 	o Interpret INTERVAL '1 year' MONTH as CAST (INTERVAL '1 year' AS
> 	  INTERVAL MONTH), and this should return '12 months'
> 	o Round or truncate values to the requested precision, e.g.
> 	  INTERVAL '11 months' AS YEAR should return one or zero

< 	o Add support for day-time syntax, INTERVAL '1 2:03:04'
> 	o Add support for day-time syntax, INTERVAL '1 2:03:04'
192c192,194
< 	o Interpret INTERVAL '1:30' MINUTE TO SECOND as '1 minute 30 seconds'
> 	o Interpret syntax that isn't uniquely ANSI or PG, like '1:30' or
> 	  '1' as ANSI syntax, e.g. interpret '1:30' MINUTE TO SECOND as
> 	  '1 minute 30 seconds'

< * Add support for ANSI time INTERVAL syntax, INTERVAL '1 2:03:04' DAY TO SECOND
< * Add support for ANSI date INTERVAL syntax, INTERVAL '20-6' YEAR TO MONTH
< * Process mixed ANSI/PG INTERVAL syntax, and round value to requested precision
<
<   Interpret INTERVAL '1 year' MONTH as CAST (INTERVAL '1 year' AS INTERVAL
<   MONTH), and this should return '12 months'
<
< * Interpret INTERVAL '1:30' MINUTE TO SECOND as '1 minute 30 seconds'
> * Add ANSI INTERVAL handling
> 	o Add support for day-time syntax, INTERVAL '1 2:03:04'
> 	  DAY TO SECOND
> 	o Add support for year-month syntax, INTERVAL '50-6' YEAR TO MONTH
> 	o Process mixed ANSI/PG syntax, and round value to requested
> 	  precision or generate an error
> 	o Interpret INTERVAL '1 year' MONTH as CAST (INTERVAL '1 year' AS
> 	  INTERVAL MONTH), and this should return '12 months'
> 	o Interpret INTERVAL '1:30' MINUTE TO SECOND as '1 minute 30 seconds'
> 	o Support precision, CREATE TABLE foo (a INTERVAL MONTH(3))

from WAL.  A couple other grammatical improvements too.

< * Add support for ANSI date INTERVAL syntax, INTERVAL '9-3' YEAR TO MONTH
> * Add support for ANSI date INTERVAL syntax, INTERVAL '20-6' YEAR TO MONTH

< * Add support for ANSI date INTERVAL syntax, INTERVAL '1-2' YEAR TO MONTH
> * Add support for ANSI date INTERVAL syntax, INTERVAL '9-3' YEAR TO MONTH

ExclusiveLock rather than AccessExclusiveLock. This will allow concurrent
SELECT queries to proceed on the table. Per discussion with Andrew at
SuperNews.

> 	o Add MOVE to PL/pgSQL

> 	o Update pg_dump and psql to use the new COPY libpq API (Christopher)

>
> * Interpret INTERVAL '1:30' MINUTE TO SECOND as '1 minute 30 seconds'

> * Add support for ANSI time INTERVAL syntax, INTERVAL '1 2:03:04' DAY TO SECOND
> * Add support for ANSI date INTERVAL syntax, INTERVAL '1-2' YEAR TO MONTH
> * Process mixed ANSI/PG INTERVAL syntax, and round value to requested precision
184a188,189
>   Interpret INTERVAL '1 year' MONTH as CAST (INTERVAL '1 year' AS INTERVAL
>   MONTH), and this should return '12 months'

< * Allow a warm standby system to also allow read-only queries

> * Allow WAL replay of CREATE TABLESPACE to work when the directory
>   structure on the recovery computer is different from the original

> 	o Update pg_dump and psql to use the new COPY libpq API

< 	o Update to use the newer COPY syntax

> 	o Update to use the newer COPY syntax

>
> * Support table partitioning that allows a single table to be stored
>   in subtables that are partitioned based on the primary key or a WHERE
>   clause

<
< 	o Prevent conflicting SET options from being set
<
< 	  This requires a checking function to be called after the server
< 	  configuration file is read.

explicit paths, so that the log can be replayed in a data directory
with a different absolute path than the original had.  To avoid forcing
initdb in the 8.0 branch, continue to accept the old WAL log record
types; they will never again be generated however, and the code can be
dropped after the next forced initdb.  Per report from Oleg Bartunov.
We still need to think about what it really means to WAL-log CREATE
TABLESPACE commands: we more or less have to put the absolute path
into those, but how to replay in a different context??

critical places in execQual.  By Atsushi Ogawa; some minor cleanup by moi.

PageIndexTupleDelete() with a single pass of compactification ---
logic mostly lifted from PageRepairFragmentation.  I noticed while
profiling that a VACUUM that's cleaning up a whole lot of deleted
tuples would spend as much as a third of its CPU time in
PageIndexTupleDelete; not too surprising considering the loop method
was roughly O(N^2) in the number of tuples involved.

up-to-speed logic; in particular this will cause it to quote names that
match keywords.  Remove unnecessary multibyte cruft from quote_literal
(all backend-internal encodings are 8-bit-safe).

* test error handling
* add tests for des, 3des, cast5
* add some tests to blowfish, rijndael
* Makefile: ability to specify different tests for different crypto
  libraries, so we can skip des, 3des and cast5 for builtin.

Marko Kreen

Reserve px_get_random_bytes() for strong randomness,
add new function px_get_pseudo_random_bytes() for
weak randomness and use it in gen_salt().

On openssl case, use RAND_pseudo_bytes() for
px_get_pseudo_random_bytes().

Final result is that is user has not configured random
souce but kept the 'silly' one, gen_salt() keeps
working, but pgp_encrypt() will throw error.

Marko Kreen

* openssl.c: Add 3des and AES support
* README.pgcrypto: list only supported ciphers for openssl

OpenSSL has pre-processor symbol OPENSSL_NO_AES, which
isn't that helpful for detecting if it _does_ exist.
Thus the hack with AES_ENCRYPT.

Marko Kreen

* Use error codes instead of -1
* px_strerror for new error codes
* calling convention change for px_gen_salt - return error code
* use px_strerror in pgcrypto.c

Marko Kreen

  It was a bad style to begin with, and now several loops can be clearer.
* pgcrypto.c: Fix function comments
* crypt-gensalt.c, crypt-blowfish.c: stop messing with errno
* openssl.c: use px_free instead pfree
* px.h: make redefining px_alloc/px_realloc/px_free easier

Marko Kreen

libmcrypt seems to dead, maintainer address bounces,
and cast-128 fails on 2 of the 3 test vectors from RFC2144.

So I see no reason to keep around stuff I don't trust
anymore.

Support for several crypto libraries is probably only
confusing to users, although it was good for initial
developing - it helped to find hidden assumptions and
forced me to create regression tests for all functionality.

Marko Kreen

convention for isnull flags.  Also, remove the useless InsertIndexResult
return struct from index AM aminsert calls --- there is no reason for
the caller to know where in the index the tuple was inserted, and we
were wasting a palloc cycle per insert to deliver this uninteresting
value (plus nontrivial complexity in some AMs).
I forced initdb because of the change in the signature of the aminsert
routines, even though nothing really looks at those pg_proc entries...

rather than an integer, and fix the associated fallout. From Alvaro
Herrera.

EXPLAIN ANALYZE instrumentation.  Magnus Hagander

to write out data that we are about to tell the filesystem to drop.
smgr_internal_unlink already had a DropRelFileNodeBuffers call to
get rid of dead buffers without a write after it's no longer possible
to roll back the deleting transaction.  Adding a similar call in
smgrtruncate simplifies callers and makes the overall division of
labor clearer.  This patch removes the former behavior that VACUUM
would write all dirty buffers of a relation unconditionally.

snprintf is called before the memory system is started.  We have to just
malloc/free.  There are no elogs in the code so we should be fine.